The below website will give you the current conversion from British Pounds to Dollars.
http://www.x-rates.com/calculator.html
Depending on what payment Mike takes, Paypal and Credit Cards will do the conversion based on the exchange rate for when the transaction is processed.
So the unit for the Wave, Boost system would be
Approx $183.05 (US Website price is $219)
Mounting Bracket
approx $26.89
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Mikey I'm in for one
3rd Generation with Nav system (I'm confused if the Nav is relevant or not?)
Metal No Holes Bracket
MacGuruTX